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Delimited groups parsing

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Denis Redozubov 2023-05-03 17:44:49 +04:00
parent 8c65e8a0b0
commit c642c72061
1 changed files with 37 additions and 7 deletions
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44
src/dsl/dsl.rs
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@ -44,12 +44,12 @@ pub struct Times(u16);
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum GroupOrNote {
RepeatGroup(Group, Times),
SingleGroup(Group),
SingleNote(Note)
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Group { notes: Vec<GroupOrNote>, length: Length }
pub struct Group { notes: Vec<GroupOrNote>, length: Length, times: Times }
static WHOLE : Length = Length::Simple(ModdedLength::Plain(BasicLength::Whole));
static HALF : Length = Length::Simple(ModdedLength::Plain(BasicLength::Half));
@ -78,6 +78,10 @@ static SIXTY_FOURTH_TRIPLET : Length = Length::Triplet(ModdedLength::Plain(Basic
static HIT : GroupOrNote = GroupOrNote::SingleNote(Note::Hit);
static REST : GroupOrNote = GroupOrNote::SingleNote(Note::Rest);
static ONCE : Times = Times(1);
static TWICE: Times = Times(2);
static THRICE : Times = Times(3);
fn hit(input: &str) -> IResult<&str, Note> {
map(char('x'), |_| { Note::Hit })(input)
}
@ -126,15 +130,29 @@ fn length(input: &str) -> IResult<&str, Length> {
alt((triplet_length, tied_length, map(modded_length, |x| { Length::Simple(x) })))(input)
}
fn times(input: &str) -> IResult<&str, Times> {
map(map_res(digit1, str::parse), |x| { Times(x) } )(input)
}
fn group(input: &str) -> IResult<&str, Group> {
let (rem, (l, n)) = tuple((length, many1(note)))(input)?;
Ok((rem, Group{ notes: n.iter().map(|x| GroupOrNote::SingleNote(x.clone())).collect(), length: l}))
let repeated = map(tuple((times, char(','), length, many1(note))), |(t, _, l, n)| { (t, l, n)} );
let single = map(tuple((length, many1(note))), |(l, vn)| { (Times(1), l, vn) } );
let (rem, (t, l, n)) = alt((repeated, single))(input)?;
Ok((rem, Group{ notes: n.iter().map(|x| GroupOrNote::SingleNote(x.clone())).collect(), length: l, times: t}))
}
fn delimited_group(input: &str) -> IResult<&str, Group> {
delimited(char('('), group, char(')'))(input)
}
fn group_or_delimited_group(input: &str) -> IResult<&str, Group> {
alt((delimited_group, group))(input)
}
fn groups(input: &str) -> IResult<&str, Vec<Group>> {
many1(group_or_delimited_group)(input)
}
#[test]
fn parse_length() {
assert_eq!(length("16"), Ok(("", SIXTEENTH.clone())));
@ -145,9 +163,21 @@ fn parse_length() {
#[test]
fn parse_group() {
assert_eq!(group("16x--x-"), Ok(("", Group{notes: vec![HIT.clone(), REST.clone(), REST.clone(), HIT.clone(), REST.clone()], length: SIXTEENTH.clone()})));
assert_eq!(group("8txxx"), Ok(("", Group { notes: vec![HIT.clone(), HIT.clone(), HIT.clone()], length: EIGHTH_TRIPLET.clone()})));
assert_eq!(group("16+32x-xx"), Ok(("", Group {notes: vec![HIT.clone(), REST.clone(), HIT.clone(), HIT.clone()], length: Length::Tied(ModdedLength::Plain(BasicLength::Sixteenth), ModdedLength::Plain(BasicLength::ThirtySecond))})))
assert_eq!(group("16x--x-"), Ok(("", Group { times: ONCE.clone(), notes: vec![HIT.clone(), REST.clone(), REST.clone(), HIT.clone(), REST.clone()], length: SIXTEENTH.clone()})));
assert_eq!(group("8txxx"), Ok(("", Group { times: ONCE.clone(), notes: vec![HIT.clone(), HIT.clone(), HIT.clone()], length: EIGHTH_TRIPLET.clone()})));
assert_eq!(group("16+32x-xx"), Ok(("", Group { times: ONCE.clone(), notes: vec![HIT.clone(), REST.clone(), HIT.clone(), HIT.clone()], length: Length::Tied(ModdedLength::Plain(BasicLength::Sixteenth), ModdedLength::Plain(BasicLength::ThirtySecond))})));
assert_eq!(group("3,16xx"), Ok(("", Group { times: THRICE.clone(), length: SIXTEENTH.clone(), notes: vec![HIT.clone(), HIT.clone()] })));
}
#[test]
fn parse_delimited_group() {
assert_eq!(delimited_group("(3,16x--x-)"), Ok(("", Group { times: THRICE.clone(), notes: vec![HIT.clone(), REST.clone(), REST.clone(), HIT.clone(), REST.clone()], length: SIXTEENTH.clone()})));
}
#[test]
fn parse_group_or_delimited_group() {
assert_eq!(group_or_delimited_group("(3,16x--x-)"), Ok(("", Group { times: THRICE.clone(), notes: vec![HIT.clone(), REST.clone(), REST.clone(), HIT.clone(), REST.clone()], length: SIXTEENTH.clone()})));
assert_eq!(group_or_delimited_group("16x--x-"), Ok(("", Group { times: ONCE.clone(), notes: vec![HIT.clone(), REST.clone(), REST.clone(), HIT.clone(), REST.clone()], length: SIXTEENTH.clone()})));
}
// “x” hit